obsidian

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ob·sid·i·an

 (ŏb-sĭd′ē-ən)
n.
A usually black or banded, hard volcanic glass that displays shiny, curved surfaces when fractured and is formed by rapid cooling of lava.

[Latin obsidiānus, misreading of obsiānus (lapis), Obsian (stone), obsidian, after Obsius, a Roman who supposedly discovered it or a similar mineral.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

obsidian

(ɒbˈsɪdɪən)
n
(Geological Science) a dark volcanic glass formed by very rapid solidification of lava. Also called: Iceland agate
[C17: from Latin obsidiānus, erroneous transcription of obsiānus (lapis) (stone of) Obsius, the name (in Pliny) of the discoverer of a stone resembling obsidian]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ob•sid•i•an

(əbˈsɪd i ən)

n.
a volcanic glass similar in composition to granite, usu. dark but transparent in thin pieces, and having a good conchoidal fracture.
[1790–1800; < Latin Obsidiānus, printer's error for Obsiānus pertaining to Obsius, the discoverer (according to Pliny) of a similar mineral in Ethiopia; compare Middle English obsianus < Latin; see -an1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

ob·sid·i·an

(ŏb-sĭd′ē-ən)
A shiny, usually black, volcanic glass. Obsidian forms from lava that cools so quickly that minerals do not have a chance to form within it.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

obsidian

A glassy volcanic rock.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.obsidian - acid or granitic glass formed by the rapid cooling of lava without crystallizationobsidian - acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces
volcanic glass - a kind of natural glass produced when molten lava cools very rapidly
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
laavakiviobsidiaani
opsidijan
hrafntinna
黒曜石

obsidian

[ɒbˈsɪdɪən] Nobsidiana f
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

obsidian

[ɒbˈsɪdɪən] nossidiana
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
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The division offers services in AS/400 (in particular the Synon/2E and Obsydian development tools) and Oracle (application development and DBA).